<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
      <ul>
        <li v-if="flag" v-for="item in list" :key="item">{{ item }}</li>
      </ul>
    </div>

    <script src="../lib/vue.js"></script>
    <script>
      new Vue({
        data: {
          list: ["a", "b", "c", "d"],
          flag: false,
        },
      }).$mount("#app");
    </script>
  </body>
</html>
